基于半正定测量的光量子OFDM通信系统在离散高斯噪声环境下的性能分析

Performance Analysis of Optical Quantum OFDM System Based on POVM under Discrete Gaussian Noise

目前主流的通信方式主要基于传统的无线电通信,面对更复杂的通信环境,这种通信方式越来越难以满足要求,即使是作为补充的经典光通信,也存在诸多瓶颈。为了能够提高通信速率,增强通信安全性,推进量子通信网络实用化进程,研究了采用基于全光OFDM的量子通信模型以及半正定检测中性能较好的最小平方根的量子检测方法。此外,出于实际环境考虑,在系统的传输过程中引入了离散相干态近似这一模型。最后,对引入离散量子高斯噪声的系统进行了仿真,讨论了量子热噪声及不同噪声参数对系统性能造成的影响。

The current communication is based on traditional radio communication.However,due to the increasing complexity of modern communication environment,even the classical optical communication still has many bottlenecks.In order to improve the speed of communication system,increase overall security and push forward the practical process of quantum communication network,we have studied the all-optical based OFDM quantum communication system and the least square root measure among positive operator valued measures.Furthermore,for practical consideration,we have introduced the discrete quantum thermal Gaussian noise and done a few simulations.Some impacts of different noise parameters are discussed at the end of the article.